how to insert a new keyfigure with out distrubing the existed data

hi experts,

i have the keyfigures like C1,C2,C3,C4.after execute the data, i want to insert 5th kf C5 between C2 and C3 with out disturbing the existed data as well as with out creating another infopackage. is it possible, if yes pl tell me step by step procedure.